Device for the supply of ventilating air in rooms



June 1968 B. LARKFELDT ETAL 3, ,6

DEVICE FOR THE SUPPLY OF VENTILATING AIR IN ROOMS Filed July 11, 1966 'FI6. I

YATTYS.

United States Patent 3,389,648 DEVICE FOR THE SUPPLY 0F VENTILATING AIRIN ROOMS Birger Litrkfeldt, Odensjo, Barnarp, and Ice! Rosenberg,Jonkoping, Sweden, assignors to Alrtiebolaget Svenslra Flaktfabrilren,Stockholm, Sweden Filed July 11, 1966, Ser. No. 564,230 Claims priority,application Sweden, July 12, 1965, 9,148/65 4 Claims. (Ci. 98-41)ABSTRACT 0F THE DISCLGSURE Apparatus for injecting ventilating air intopremises including a rectangular box having upstanding side and endwalls and a bottom wall, the side walls being spaced apart between 17and 21 mm. The ventilating air enters the box for injection into thepremises, adjacent the bottom Wall of the box through one of the sidewalls. At the upper end of the box is a laterally extending damper whichis hingedly mounted on one of the side walls and which forms, with theother side wall, a slot of variable width. Regulating means, connectedto the damper permit selective variation of the slot Width.

The present invention relates to a device connected to a ventilatingsystem for the injection of ventilating air in premises, especiallybehind radiators. v

In order that the sound which arises when ventilating air is injectedinto premises shall cause as little disturbance as possible, it is knownto provide the injection aperture with nozzles which impart to theoutflowing air a flow as completely laminar as possible. By, for examplearranging rows of nozzles transversely across a slot relatively goodresults have earlier been attained.

The present invention offers a simpler and better solution of theproblems which are connected with the design of a ventilating airinjecting device. By placing the duct connection to the injecting deviceunder the floor, the device will take up a minimum of space and not toany extent worth mentioning encroach upon the space in the premises.

The invention is characterized in that the injecting device consists ofa rectangular box open at the top, at the first side wall of which amovable damper is hingedly mounted along the edge facing said open topfor the purpose of forming with the second opposing side wall an outflowslot of variable width, whereat the fixed distance between the wallsreferred to lies Within the range 17 to 21 mm., and that the connectingduct is arranged in such a way as to open into said first side wallimmediately adjacent to the bottom of the box.

A further embodiment is characterized in that said second side wall isarranged parallel with and immediately adjacent to a wall in thepremises, and that the Width of the outflow slot may be varied by theaid of a regulating means actuating said damper.

Other objects and a fuller understanding of the present invention may behad by referring to the following specification and claims taken inconjunction with the accompanying drawing in which:

FIG. 1 is a fragmentary sectional side elevational view of the injectingdevice; and

FIG. 2 is a plan view of the device shown in FIG. 1 and as if FIG. 1were not in section.

Referring now to the drawing, the injecting device of the presentinvention comprises a rectangular box 2 having laterally spaced,upstanding first and second side walls 3,389,648 Patented June 25, 19684 and 3 respectively, joined to upstanding and laterally spaced endwalls 8 and 9. A bottom wall 6 closes the lower portion of the box andis connected to the side and end walls.

The second side wall 3, opposite the inlet of the duct 1, is arrangedparallel and immediately adjacent to a wall 10 in the premises. On thesame side as the connecting duct the side wall 4 is at its upper edgeprovided with a hingedly mounted, laterally extending damper to form,with the second side wall an outflow slot of variable width. The widthof the outflow slot can be varied by the aid of regulating means, in thepresent instance comprising a screw 7, which actuates the damper 5. Thedistance between the side walls 3 and 4 has been chosen to lie withinthe range 17 to 24 mm. As set forth above, and as shown in FIG. 1, thebox 2 extends through the floor 11, the duct 1 being connected beneaththe floor to the box 2.

Thus although the invention has been described with a certain degree ofparticularity, it should be understood that the present disclosure isonly exemplary of the invention, and that numerous changes in thedetails of construction, and the combination and arrangement of partsmay be made without departing from the spirit and scope of the inventionas hereinafter claimed.

What is claimed is:

1. Apparatus for injecting ventilating air into premises, said apparatuscomprising an open-top rectangular box having laterally spacedupstanding first and second side walls joined to upstanding andlaterally spaced end walls, a bottom wall connected to said side and endWalls, and means in one of said side walls adjacent said bottom Wall forinjecting ventilating air into said box, said side walls being spacedone from the other a distance between 17 and 21 millimeters; a laterallyextending damper spaced from said bottom Wall and hingedly connected tosaid first side wall to form, with the second of said side walls, anoutflow slot of variable width, said second wall being planar from saidbottom wall to said open top and terminating in said outflow slotwhereby the injected air is discharged upwardly therethroughsubstantially coplanar with said second wall.

2. Apparatus in accordance with claim 1 wherein said box is adapted forplacement with the second wall thereof adjacent the wall of saidpremises, and including regulating means connected to said damper tovary the width of said slot.

'3. Apparatus in accordance with claim 1 wherein said box is positionedalong one wall of a premises and extends through a floor, said means forproviding ventilating air being connected beneath said floor to saidbox.

4. Apparatus in accordance with claim 1 wherein said first wall isplanar from said bottom wall to said hingedly connected damper andterminates in said connection, said damper extending upwardly therefromtowards said second planar Wall.

References Cited UNITED STATES PATENTS 1,063,645 6/1913 Boles 981063,106,147 10/1963 Cones 9838 3,272,109 9/1966 Brandes 9840 2,345,5363/1944 Keep 98-38 X 2,850,959 9/ 1958 Watkins 98--38 3,081,689 3/1963Bell 98-40 3,265,859 8/1966 Castello et al 98--4O ROBERT A. OLEARY,Primary Examiner.

W. E. WAYNER, Assistant Examiner.

